Quality and quantity of milk produced by Saanen goats submitted to stress during three sequential days
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
30/10/2013
30/10/2013
02/08/2013
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Resumo |
The experiment aimed to study the effect of physiological stress on cortisol levels, quality and quantity of milk through punctual administration of ACTH. Twelve Saanen goats were divided in two experimental groups: ACTH group (0,5 mu g of ACTH/Kg.L.W); Placebo group (placebo solution). Milk production, and percentages of protein, fat, lactose and SCC (somatic cells counting) of the milk were analyzed before, during and after the administration of ACTH/placebo. Simultaneously to the ACTH/placebo administration and during three sequential days, blood was collected to evaluate cortisol concentrations. At times -30 and zero, both groups presented basal concentrations of cortisol. The increase of cortisol contents was significant at times 60 (group ACTH: 59.00 +/- 5.70 and groups placebo: 5.23 +/- 1.37ng/mL) and 120 (group ACTH: 47.96 +/- 9.72 and group placebo: 4.38 +/- 1,14ng/mL) since the cortisol content was higher on the ACTH group. The values returned to the basal level at 300 minutes. Concerning milk production, no differences were found between ACTH and placebo groups. Milk, protein, fat, lactose and SCC did not distinguish one group from another. The results indicated that the physiological stress induced during three days was not harmful to milk production and milk quality of Saanen goats. |
Identificador |
ARQUIVO BRASILEIRO DE MEDICINA VETERINARIA E ZOOTECNIA, MINAS GERAIS, v. 64, n. 5, supl. 18, Part 1-2, pp. 1373-1380, OCT, 2012 0102-0935 http://www.producao.usp.br/handle/BDPI/36837 10.1590/S0102-09352012000500039 |
Idioma(s) |
por |
Publicador |
ARQUIVO BRASILEIRO MEDICINA VETERINARIA ZOOTECNIA MINAS GERAIS |
Relação |
ARQUIVO BRASILEIRO DE MEDICINA VETERINARIA E ZOOTECNIA |
Direitos |
openAccess Copyright ARQUIVO BRASILEIRO MEDICINA VETERINARIA ZOOTECNIA |
Palavras-Chave | #SOMATIC CELLS COUNTING #CORTISOL #FAT #LACTOSE #PROTEIN #SOMATIC-CELL COUNT #HOLSTEIN COWS #MACHINE MILKING #LACTATING GOATS #DAIRY EWES #CORTISOL #RESPONSES #RELEASE #OXYTOCIN #ACTH #VETERINARY SCIENCES |
Tipo |
article original article publishedVersion |